<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            display: flex;
            width: 70%;
            height: 200px;
            background-color: pink;
        }
        .box span{
            height: 100px;
            flex: 1;
            margin-left: 10px;
            background-color: red;
        }
        .box span:nth-child(2){
            align-self: center;
        }

    </style>
</head>
<body>
    <div class="box">
        <span></span>
        <span></span>
        <span></span>
    </div>
</body>
</html>